import numpy as np
import cv2
# 创建画布
img = np.zeros((512, 512, 3), np.uint8)
img = cv2.line(img, (0, 0), (250, 250), (0, 0, 255), 2)
img = cv2.rectangle(img,(384,0),(510,128),(0,255,0),3)
img = cv2.circle(img,(447,63), 63, (0,0,255), -1)
# 字体变量
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img,'OpenCV',(10,500), font, 4,(255,255,255),2,cv2.LINE_AA)

cv2.imshow('img',img)

cv2.waitKey(0)

cv2.destroyAllWindows()